Happy news: Tori Spelling is pregnant with her fourth child, seen here with husband Dean McDermott and their brood, from left, Hattie, Liam and Stella

Tori Spelling is pregnant with her fourth child.The former Beverly Hills 90210 star - who is married to Dean McDermott - announced the happy news on her Twitter account today.She posted a message saying: 'Our family has some exciting and life changing news to share,' which linked to her website.Tori wrote: 'Dean, Liam, Stella, Hattie, and I are beyond thrilled to announce that another little McDermott is on the way! 'We feel truly blessed that another angel has found us.'She also posted a picture of her bump with her children's hands resting on top of it.Tori has fallen pregnant just months after giving birth to Hattie.

Another bump on board: Tori posted a picture of her bump with her children's hands on it as she announced she is pregnant with her fourth child

Given that couples normally wait to the three-month mark before announcing the happy news it is likely she fell pregnant in December after welcoming her third child in October. In April last year the Tori and Dean, who married in 2006, took to Twitter to announce they were expecting their third child. After giving birth to Hattie Tori spoke of her desire to have a large family.

Permanently pregnant? Tori has fallen pregnant just five months after giving birth to her third child

The 38-year-old reality TV star revealed: 'People say, 'Oh my God, it's utter chaos after two.' But it's not, it's great.'You lost your mind after the second one, so the third fourth and fifth, it's like you're so far gone, it's just kind of the same.' Dean, 46, added: 'As soon as I saw it was positive and it was a pregnancy, we both thought we need to have a fourth - at the same time.'